/*
 *  *  Mathlib : A C Library of Special Functions
 *   *  Copyright (C) 1998-2011  The R Development Core Team
 *    *
 *     *  This program is free software; you can redistribute it and/or modify
 *      *  it under the terms of the GNU General Public License as published
 *      by
 *       *  the Free Software Foundation; either version 2 of the License, or
 *        *  (at your option) any later version.
 *         *
 *          *  This program is distributed in the hope that it will be useful,
 *           *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *            *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *             *  GNU General Public License for more details.
 *              *
 *               *  You should have received a copy of the GNU General Public
 *               License
 *                *  along with this program; if not, a copy is available at
 *                 *  http://www.r-project.org/Licenses/
 *                  */

/* Private header file for use during compilation of Mathlib */
#ifndef MATHLIB_PRIVATE_H
#define MATHLIB_PRIVATE_H

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <math.h>
#include <float.h> /* DBL_MIN etc */

#include <Rconfig.h>
#include <Rmath.h>

double  Rf_d1mach(int);
#define gamma_cody  Rf_gamma_cody
double  gamma_cody(double);

#include <R_ext/RS.h>

/* possibly needed for debugging */
#include <R_ext/Print.h>


#ifndef MATHLIB_STANDALONE

#include <R_ext/Error.h>
# define MATHLIB_ERROR(fmt,x)       error(fmt,x);
# define MATHLIB_WARNING(fmt,x)     warning(fmt,x)
# define MATHLIB_WARNING2(fmt,x,x2) warning(fmt,x,x2)
# define MATHLIB_WARNING3(fmt,x,x2,x3)  warning(fmt,x,x2,x3)
# define MATHLIB_WARNING4(fmt,x,x2,x3,x4) warning(fmt,x,x2,x3,x4)

#include <R_ext/Arith.h>
#define ML_POSINF   R_PosInf
#define ML_NEGINF   R_NegInf
#define ML_NAN      R_NaN


void R_CheckUserInterrupt(void);
/* Ei-ji Nakama reported that AIX 5.2 has calloc as a macro and objected
 *    to redefining it.  Tests added for 2.2.1 */
#ifdef calloc
# undef calloc
#endif
#define calloc R_chk_calloc
#ifdef free
# undef free
#endif
#define free R_chk_free

#ifdef ENABLE_NLS
#include <libintl.h>
#define _(String) gettext (String)
#else
#define _(String) (char *)(String)
#endif

#else
/* Mathlib standalone */

#include <stdio.h>
#include <stdlib.h> /* for exit */
#define MATHLIB_ERROR(fmt,x)    { Rprintf(fmt,x); Rf_error("Serious error in Massifquant\n"); }
#define MATHLIB_WARNING(fmt,x)      Rprintf(fmt,x)
#define MATHLIB_WARNING2(fmt,x,x2)  Rprintf(fmt,x,x2)
#define MATHLIB_WARNING3(fmt,x,x2,x3)   Rprintf(fmt,x,x2,x3)
#define MATHLIB_WARNING4(fmt,x,x2,x3,x4) Rprintf(fmt,x,x2,x3,x4)

#define ISNAN(x) (isnan(x)!=0)
#define R_FINITE(x)    R_finite(x)
int R_finite(double);

#define ML_POSINF   (1.0 / 0.0)
#define ML_NEGINF   ((-1.0) / 0.0)
#define ML_NAN      (0.0 / 0.0)

#define _(String) String
#endif /* standalone */

#define ML_VALID(x) (!ISNAN(x))

#define ME_NONE     0
/*  no error */
#define ME_DOMAIN   1
/*  argument out of domain */
#define ME_RANGE    2
/*  value out of range */
#define ME_NOCONV   4
/*  process did not converge */
#define ME_PRECISION    8
/*  does not have "full" precision */
#define ME_UNDERFLOW    16
/*  and underflow occured (important for IEEE)*/

#define ML_ERR_return_NAN { ML_ERROR(ME_DOMAIN, ""); return ML_NAN; }

/* For a long time prior to R 2.3.0 ML_ERROR did nothing.
 *    We don't report ME_DOMAIN errors as the callers collect ML_NANs into
 *       a single warning.
 *        */
#define ML_ERROR(x, s) { \
    if(x > ME_DOMAIN) { \
        char *msg = _(""); \
        switch(x) { \
            case ME_DOMAIN: \
                            msg = _("argument out of domain in '%s'\n"); \
            break; \
            case ME_RANGE: \
                           msg = _("value out of range in '%s'\n"); \
            break; \
            case ME_NOCONV: \
                            msg = _("convergence failed in '%s'\n"); \
            break; \
            case ME_PRECISION: \
                               msg = _("full precision may not have been achieved in '%s'\n"); \
            break; \
            case ME_UNDERFLOW: \
                               msg = _("underflow occurred in '%s'\n"); \
            break; \
        } \
        MATHLIB_WARNING(msg, s); \
    } \
}

/* Wilcoxon Rank Sum Distribution */

#define WILCOX_MAX 50

#ifdef HAVE_VISIBILITY_ATTRIBUTE
# define attribute_hidden __attribute__ ((visibility ("hidden")))
#else
# define attribute_hidden
#endif

/* Formerly private part of Mathlib.h */

/* always remap internal functions */
#define bd0         Rf_bd0
#define chebyshev_eval  Rf_chebyshev_eval
#define chebyshev_init  Rf_chebyshev_init
#define gammalims   Rf_gammalims
#define lfastchoose Rf_lfastchoose
#define lgammacor   Rf_lgammacor
#define stirlerr        Rf_stirlerr
/* in Rmath.h
 * #define gamma_cody      Rf_gamma_cody
 * */

/* Chebyshev Series */

int attribute_hidden chebyshev_init(double*, int, double);
double  attribute_hidden chebyshev_eval(double, const double *, const int);

/* Gamma and Related Functions */

void    attribute_hidden gammalims(double*, double*);
double  attribute_hidden lgammacor(double); /* log(gamma) correction */
double  attribute_hidden stirlerr(double);  /* Stirling expansion "error" */

double  attribute_hidden lfastchoose(double, double);

double  attribute_hidden bd0(double, double);

double  attribute_hidden dbinom_raw(double, double, double, double, int);
double  attribute_hidden dpois_raw (double, double, int);
double  attribute_hidden pnchisq_raw(double, double, double, double, double, int, Rboolean);
double  attribute_hidden pgamma_raw(double, double, int, int);
double  attribute_hidden pbeta_raw(double, double, double, int, int);
double  attribute_hidden qchisq_appr(double, double, double, int, int, double tol);
long double attribute_hidden pnbeta_raw(double, double, double, double, double);
double  attribute_hidden pnbeta2(double, double, double, double, double, int, int);

int Rf_i1mach(int);

/* From toms708.c */
void attribute_hidden bratio(double a, double b, double x, double y,
        double *w, double *w1, int *ierr, int log_p);


#endif /* MATHLIB_PRIVATE_H */
